JP6958672B2 - Grain dryer - Google Patents

Description

The present invention relates to a grain dryer.

The grain dryer described in Patent Document 1 is an example in which a far-infrared radiator is provided in the exhaust chamber of the drying portion, and the grain dryer described in Patent Document 2 is a bottom portion in a transport gutter at the upper part of the storage chamber. A shutter is provided so that the residue after grain circulation can be removed.

Japanese Patent No. 5228844 Japanese Patent No. 4042591

There is a problem that difficult work such as the top of the grain dryer or the inside of the drying part is unavoidable for the inspection and maintenance work for removing the dust in the drying part.

An object of the present invention is to provide a grain dryer capable of simplifying the work of removing dust from a drying portion.

The invention according to claim 1 is
A storage section (2) for storing grains and a drying section are vertically configured in the machine wall of the box body, and an operation panel (P) is provided on the front side of the drying section (3).
The drying unit (3) includes a hot air chamber (11) that receives hot air from the hot air supply unit (6), an exhaust chamber (12) that connects to the suction / exhaust unit (40), a hot air chamber (11), and an exhaust air. A grain drying passage (13) for guiding the grain received from the storage section (2) is provided between the chambers (12).
The grain drying passage (13) is formed over the front-rear direction of the drying portion (3) and is also composed of a drying net through which hot air passes, and a part (41) of the drying net can be opened and closed from the left and right outside of the machine wall. configured,
A stopper is provided to stop a part (41) of the drying net that opens and closes so as to give a pressing action to the remaining drying net side, and the stopper is a part (41) side of the drying net or the remaining drying. Attached to the net side,
The grain dryer is characterized in that a cleaning window (B) that can be opened and closed is provided on the front wall (31) and the rear wall (32) of the grain drying passage (13), respectively.

The invention according to claim 2 is
A hot air supply unit (6), which is a burner case for accommodating a burner (6a), is provided on the front wall (31) side of the airframe, and an exhaust fan (40a) is provided on the rear wall (32) side of the airframe.
A cleaning window (A) that can be opened and closed is provided on the front wall (31) below the hot air supply unit (6) of the exhaust chamber (12) and the rear wall (32) below the exhaust fan (40a).
A cleaning window (C) that can be opened and closed is provided on the front wall (31) below the hot air supply unit (6) of the hot air chamber (11) and the rear wall (32) below the exhaust fan (40a). The grain dryer according to claim 1, which is a feature.

According to the present invention, dust in the grain drying passage can be removed.

In addition, the drying net can be opened and closed without dropping bolts or the like into the machine.

In addition, dust in the exhaust air chamber and the hot air chamber can be removed.

External perspective view of grain dryer Internal configuration diagram from the front view of the grain dryer Transmission configuration perspective view of internal equipment Enlarged side view of the opening / closing shutter part of the transport spiral gutter Perspective view of the main part on the front side of the dry part Front view of the dry part Side view of the front wall side of the dry part Perspective view of the air streamline inside the aircraft through the inspection window Changeover switch connection diagram Perspective view of the cleaning window where the air hose is arranged Front perspective view showing the structure of the dried part of the grain dryer Longitudinal cross-sectional view showing the inside of the front side of the dried part Perspective view from diagonally below around the cleaning window (when closed) Enlarged perspective view from diagonally below around the cleaning window (when opened) Side view (a) of the main part of the cleaning window (when closed) and its SS line cross-sectional view (b) Side view (a) of the main part of the cleaning window (when opened) and its SS line cross-sectional view (b) Enlarged perspective view of the cleaning window (when fully open) seen from diagonally below Perspective view of the main part of the dry part

An embodiment specifically configured based on the above technical idea will be described below with reference to the drawings.

(Grain dryer)
As shown in FIG. 1 for a perspective view of the external configuration of the grain dryer 1, the storage chamber 2 and the drying portion 3 are vertically configured, and the elevator 5 for transferring grains from the drying portion 3 to the storage chamber 2 is in front of the machine body. Circulate and dry the grain in preparation for the part. Further, an operation panel P and a device control controller C are provided on the front side of the drying unit 3.

(Internal configuration)
As shown in FIG. 2, the internal structure of the grain dryer 1 when viewed from the front of the drying unit 3 is a grain drying passage sandwiched between the hot air chamber 11 and the exhaust chamber 12 and the hot air chamber 11 and the exhaust chamber 12. 13 is provided. The hot air chamber 11 receives hot air from a burner (not shown) of the hot air supply unit 6 configured on the front side, and the exhaust chamber 12 includes a far-infrared radiator 23 as an auxiliary heat source and a suction / exhaust unit 40 configured on the rear side of the machine body. It is sucked and exhausted by the exhaust fan 40a of
(Equipment transmission system)
As shown in FIG. 3, the internal device of the grain dryer 1 transfers grains to the elevator 5 by the lower transport spiral gutter 18 of the drying unit 3, and stores the grains by the upper transport spiral gutter 19. The grain is put into the chamber 2, and the grain is circulated at a constant speed by the rotary valve 14 of the drying section 3, and the grain is dried by the hot air sucked by the exhaust fan 40a on the back side of the drying section 3.

In order to maintain the circulation stroke, an opening / closing shutter 21 is provided on the bottom surface of the upper transport spiral gutter 19 so as to be electrically controllable so that residual grains can be discharged to the storage chamber 2, and dust in the drying portion 3 can be discharged. For removal, a cleaning window A is formed on the front wall 31 and an opening / closing lid 33b is provided so as to be electrically controllable.

(Open / close shutter)
As shown in FIG. 4 in an enlarged side view, the opening / closing shutter 21 of the transport spiral gutter 19 is configured so that the bottom plate of the transport spiral gutter 19 can be opened / closed controlled to the storage chamber 2 side by an arm 21b rotated by an electric drive unit 21a. ..

(Cleaning window)
Further, on the front wall 31 of the drying portion 3, a perspective view, a front view, and a side view of the main part thereof are shown in order in FIGS. 5 to 7, in order to remove dust from the hot air chamber 11 and the exhaust chamber 12. A cleaning window A with an opening / closing lid 33b that can be electrically opened / closed and controlled by a manual switch 36c in connection with an advancing / retreating rod 36b extending from the drive unit 36a is provided, and a changeover switch for selecting either the opening / closing lid 33b or the opening / closing shutter 21. 37 is provided.

The cleaning window A of the front wall 31 is sucked and exhausted from the cleaning window A by the suction force of the exhaust fan 40a when the opening / closing lid 33b is opened, as shown in FIG. Accumulated dust T in the exhaust chamber 12 can be discharged along the air stream line F leading to the portion 40.

The opening / closing shutter 21 and the opening / closing lid 33b are configured to be interlockable and controllable as follows in relation to the operation of the grain dryer 1. That is, the operation of the opening / closing shutter 21 and the opening / closing lid 33b is controlled according to each operation mode during grain filling, hot air drying, ventilation drying, and grain discharge.

(Discharge interlocking)
Specifically, by opening the opening / closing lid 33b of the exhaust chamber 12 in conjunction with the discharge button S4 of the grain discharge operation of the operation panel P, dust in the exhaust chamber 12 due to the drying operation, particularly dust of the external hot air type dryer It is possible to discharge the dust pool in the exhaust air passage, and it is possible to clean the dry part each time the grain discharge operation is performed.

(Interlocked with ventilation drying)
Further, by closing the opening / closing lid 33b of the ventilation chamber 12 in conjunction with the ventilation button S2 in the ventilation drying operation, it is possible to prevent a decrease in the ventilation drying ability, and the exhaust is performed in conjunction with the drying button S3 in the hot air drying operation. By closing the opening / closing lid 33b of the air chamber 12, it is possible to prevent a decrease in the drying capacity.

(Changeover switch)
Next, regarding the removal of residual grains in the transport spiral gutter 19, as shown in FIG. 9 for the connection diagram of the changeover switch, by selecting the open / close shutter 21 with the changeover switch 37, instead of the dust of the drying portion 3, Since it is possible to discharge the residual grain in the transport spiral gutter 19, dust discharge from the drying unit 3 and the residual grain in the transport spiral gutter 19 can be performed as needed without changing the existing controller C. The above-mentioned interlocking control can be applied to any of the discharges.

(Drive unit)
In this case, the changeover switch 37 is integrally provided with the drive unit 36a to form a unit, and by relaying between the controller C and the elevator harness, it can be handled as an option of the automation unit, and the changeover switch 37 is interlocked. It is also possible to configure it as switching between the presence and absence of.

By connecting the opening / closing lid 33b with a wire instead of the opening / closing rod 36b, the opening / closing lid 33b can be removed and the inside of the machine can be cleaned without disassembling the connection between the opening / closing lid 33b and the drive unit 36a.

(Air hose)
Next, as shown in FIG. 10 as a perspective view of the cleaning window in which the air hose is arranged, the air hose 38 for air blow cleaning is arranged on the opening / closing lid 33b, and when the cleaning mode is entered and cleaning is started, the opening / closing lid is opened. By performing an air blow inside the machine in conjunction with the operation of 33b, the wind force of the exhaust fan can be assisted to improve the cleanability.
Further, by performing air blow from the air hose 38 in conjunction with the discharge operation by the discharge button S4, strong cleaning is always possible.

Further, by arranging the air hose 38 from the upper part inside the exhaust passage to the lower side, when the cleaning mode is entered and cleaning is started, dust is contained in the grain due to rubbing due to the flow of grain in the drying net unit. The exhaust passage can be air-cleaned by promoting it to fall into the air (synergistic effect).

(Cleaning window / manual opening / closing configuration)
Next, a cleaning window having a manual opening / closing configuration will be described.

FIG. 11 is a front perspective view showing the structure of the dried portion of the grain dryer, and FIG. 12 is a vertical cross-sectional view showing the inside of the front side of the dried portion.
In the grain dryer, a storage section 2 for receiving the filled grains and a drying section 3 for hot air drying while flowing down the grains from the storage section 2 are arranged vertically, and the lower part of the drying section 3 is a grain. Is a grain collecting section 4 for returning to the storage section 2, and is provided with an elevator 5 (see FIG. 13) from the grain collecting section 4 to the storage section 2 through the front portion of the machine body.

The front wall 31 of the airframe is provided with a hot air supply unit 6 which is a burner case accommodating the burner 6a, and the rear wall 32 of the airframe is provided with a suction / exhaust unit 40 for shunting exhaust air by an exhaust fan 40a. It is constructed so that it can be dried while circulating the grains.

The drying unit 3 includes a hot air chamber 11 having openings W and W for receiving hot air from the hot air supply unit 6 on the front side, an exhaust chamber 12 connected to the suction / exhaust unit 40 on the back side, and these hot air chambers 11. It is composed of grain drying passages 13 and 13 made of perforated plates that guide grains received from the storage unit 2 while allowing hot air to pass through between the exhaust chamber 12 and the grain drying passages 13 and 13. A valve 14 is provided to feed the grains flowing down the grain drying passages 13 and 13 to the grain collecting section 4 in predetermined amounts.

The grain drying passages 13 and 13 are configured so as to extend in the front-rear direction of the drying portion 3 and a plurality of rows are arranged in the left-right direction of the drying portion 3 so that the lower ends of the two adjacent grain drying passages 13 and 13 are merged. A feeding valve 14 that reverses forward and reverse is provided at the lower end portion, and the grains of the two grain drying passages 13 and 13 are alternately subjected to quantitative feeding.

The inside of both grain drying passages 13 and 13 is used as an exhaust chamber 12, and the outside of both grain drying passages 13 and 13 is formed with hot air chambers 11 and 11, respectively. Further, on the inlet side of both grain drying passages 13 and 13, a diamond-shaped diversion portion 13a and 13a made of a perforated plate are provided, respectively, to secure a long drying path while receiving a wide range of grains.

Inside the hot air chambers 11 and 11, exhaust air return passages 15 and 15 communicating from the suction exhaust unit 40 to the hot air supply unit 6 are provided in order to dry at high speed by using the exhaust air. Further, at the front end of the exhaust chamber 12, a far-infrared ray radiator 23 that promotes moisture transfer inside the grain by far-infrared ray is provided, and far-infrared ray is radiated to two grain drying passages 13 and 13 facing both sides of the far-infrared ray radiator 23. do.

The front wall 31 of the airframe is configured so that the cleaning window A of the exhaust chamber 12 can be opened and closed at a position directly below the far-infrared radiator 23. In addition, the cleaning windows B and C can be opened and closed for the grain drying passages 13 and 13 and the hot air chambers 11 and 11, respectively, and the cleaning windows A, B and C can be opened and closed for the rear wall 32 as well. Constitute.

The grain collecting unit 4 is composed of left and right inclined plates 17 and 17 for collecting discharged grains below the feeding valve 14, and a lower transfer spiral 18 for transferring the collected grains to the elevator 5.

(Cleaning window)
Explaining the cleaning window A in detail, as shown in FIG. 13, a perspective view of the area around the cleaning window (when closed) seen from diagonally below is provided with an opening / closing member 33 in the window A and extends below the hot air supply unit 6. The rod 34 for opening / closing operation is connected.

As shown in FIG. 14, an enlarged perspective view of the cleaning window portion (when opened) of the opening / closing member 33 is fixed with a wing nut or a slit plate 33a having a large number of slits or punch holes formed through which outside air can flow. It is detachably attached to the front wall 31 by a fixture 33c such as a lever, the slit plate 33a is pivotally supported by the blind plate 33b so as to be openable and closable, the rod 34 is connected to the blind plate 33b, and the rod 34 is connected to the lower part of the hot air supply unit 6. The rod holding member 35 can be attached to the blind plate 33b so that the opening and closing can be adjusted.

The blind plate 33b can close the slit plate 33a by the suction force of the exhaust fan 40a, and if necessary, the blind plate 33b is configured to be magnetically attractable.

As shown in FIG. 15, the side view (a) of the main part of the cleaning window portion (when closed) and the cross-sectional view taken along the line SS (b) of the rod 34 are formed by bending the grip 34a at the tip thereof. In addition, two bent portions P1 and P2 for positioning and holding the blind plate 33b are formed.

Specifically, when the rod 34 is pushed to the position where the blind plate 33b closes the slit plate 33a, the grip 34a is arranged on the back side from the front end of the hot air supply portion 6, and the bent portion P1 on the front side is the rod holding member. It is arranged so as to be positioned and held at 35.

Further, as shown in FIG. 16 a side view (a) of a main part of the cleaning window portion (when opened) and a sectional view (b) of the SS line, the rod 34 is pulled out and the blind plate 33b opens the slit plate 33a. At that time, the grip 34a is arranged on the front side of the front end of the hot air supply unit 6, and the bent portion P2 on the rear side is arranged so as to be held by the rod holding member 35.

In the grain dryer 1 having the above configuration, the blind plate 33b is opened by operating the rod 34 in the front-rear direction, and the suction force of the exhaust fan 40a causes the outside air to flow directly from the slit plate 33a into the exhaust chamber 12 to far infrared rays. The dust in the exhaust chamber 12 can be discharged, including the accumulated dust directly under the radiator 23.

Next, the internal cleaning of the exhaust chamber 12 will be described. As shown in FIG. 17, an enlarged perspective view of the cleaning window portion (when fully opened) viewed from diagonally below is shown by loosening the fixture 33c of the slit plate 33a and opening / closing member. By integrally removing the 33 from the front wall 31, the exhaust chamber 12 can be cleaned by inserting a cleaning tool through the fully opened cleaning window A.

Similarly, for the grain drying passages 13 and 13 and the hot air chambers 11 and 11, the dust in the drying portion 3 can be cleaned by opening the cleaning windows B and C of the front wall 31 and the rear wall 32, respectively. Maintenance with cleaning tools is possible from the front side and the back side.

As for the grain drying passages 13 and 13, as shown in FIG. 18 as shown in FIG. 18 is a perspective view of the main part of the drying portion 3, a part 41 of the drying net can be opened and closed and is pressed by a stopper to dry. Dust inside the net can be cleaned, and by configuring the upper part of the net to be openable and closable with a hinge, the net can be opened and closed without dropping bolts or the net into the machine.

Next, in the cleaning mode of the dryer, a mode in which only the exhaust fan 40a operates is provided, or only the exhaust fan 40a and the valve 14 are operated, and the elevator 5 and the valve 14 can be switched on / off. By configuring the above, it is possible to ensure the safety of cleaning work such as a drying net while other grain circulation equipment is stopped, such as when the operation location is switched.

In the above, the device being driven is displayed in 7-segment display in response to the switching of the operating location, and in the case of having a liquid crystal display, the device being driven is displayed on the liquid crystal display to ensure the safety of cleaning work such as the drying net. Can be secured.

Next, with respect to the opening / closing member 33 of the cleaning window, by superimposing the movable slit plate on the fixed slit plate and configuring the opening / closing of the slit portion to be electrically controllable, it is possible to shift to the cleaning mode and open the slit portion. Further, by opening the slit portion and then shifting to the discharge operation, efficient cleaning can be performed.

The opening / closing member capable of electrically opening / closing control is provided at the cleaning port opened on the front surface and the rear surface of the exhaust passage in the center of the machine body, and an LED light is arranged inside so that the opening / closing member can be turned on by a switch, or the opening / closing member can be used. By providing a control that turns on the LED light in conjunction with the opening, and further turns on the LED light in conjunction with the cleaning mode, it is possible to efficiently clean by introducing outside air during the discharge operation, and it also lights up. Makes it easier to check the inside.

Further, in the drying operation, when the exhaust air temperature does not rise to a predetermined reference temperature, it is possible to prevent forgetting to close the cleaning port in the drying operation by displaying an abnormality for confirming the closure of the cleaning port.

(Structural points)
The main points of the composition of the grain dryer with the above configuration are as follows.

An opening / closing lid 33b for supplying outside air is provided on the front wall 31 of the exhaust chamber 12 so as to be able to open / close control, and an opening / closing shutter 21 for opening the bottom of the upper transport spiral gutter 19 to the storage chamber 2 is provided so as to be able to open / close these. Since the collective opening / closing control for opening / closing the lid 33b and the opening / closing shutter 21 is provided, dust in the exhaust chamber 12 can be removed by opening the opening / closing lid 33b of the exhaust chamber 12, and the opening / closing shutter of the upper transport spiral gutter 19 can be removed. Since the residual grains of the upper transport spiral gutter 19 can be removed at the same time by opening 21, the upper transport spiral gutter 19 and the drying portion 3 can be cleaned at the same time as needed.

An opening / closing lid 33b for supplying outside air is provided on the front wall 31 of the hot air chamber 11 so as to be able to open / close control, and an opening / closing shutter 21 that opens the bottom of the upper transport spiral gutter 19 to the storage chamber 2 is provided so as to be able to open / close control. Since the batch opening / closing control for opening / closing the 33b and the opening / closing shutter 21 is provided, the dust in the hot air chamber 11 is removed by opening the opening / closing lid 33b of the hot air chamber 11, and the opening / closing shutter 21 of the upper transport spiral gutter 19 is opened. Since the residual grains of the upper transport spiral gutter 19 can be removed at the same time, the upper transport spiral gutter 19 and the drying portion 3 can be cleaned at the same time as needed.

An opening / closing lid 33b for supplying outside air is provided on the front wall 31 of the exhaust chamber 12 so as to be able to open / close control, and an opening / closing shutter 21 for opening the bottom of the upper transport spiral gutter 19 to the storage chamber 2 is provided so as to be able to open / close these. Since a changeover switch 37 for selecting either the lid 33b or the open / close shutter 21 and an open / close operation switch 36c for controlling the opening / closing of the selected side by the changeover switch 37 are provided, the changeover switch 37 provides the upper transport spiral gutter 19 and drying. Only one of the parts 3 can be selected and only the necessary one can be cleaned by the open / close operation switch 36c.

A helix operation switch S1 that controls the storage of grains in the storage chamber 2, a ventilation operation switch S2 that controls ventilation drying by the ventilation operation of the drying unit 3, and a drying operation switch S3 that controls hot air drying by the hot air operation of the drying unit 3. Since the discharge operation switch S4 for controlling the discharge of grains is provided and the discharge interlocking control for opening and closing the opening / closing lid 33b and the opening / closing shutter 21 is provided by the discharge operation switch S4, the opening / closing lid 33b and the opening / closing lid 33b are provided by this discharge interlocking control. Since the opening / closing shutter 21 is opened / closed in conjunction with the discharge, the upper transport spiral gutter 19 and the drying portion 3 can be cleaned according to the discharge operation.

Since the opening / closing lid 33b and the opening / closing shutter 21 are closed and controlled in conjunction with the operation of the drying operation switch S3 or the ventilation operation switch S2 by the drying ventilation interlocking control of the opening / closing lid 33b and the opening / closing shutter 21, the opening / closing lid 33b and the opening / closing shutter 21 are closed. It is possible to prevent forgetting to close the lid and enter dry operation or ventilation operation.

Since the discharge operation switch S4 for controlling the discharge of grains is provided and the selection side is controlled to be opened and closed by the changeover switch 37 by the discharge operation switch S4, the upper transport spiral gutter 19 and the drying unit 3 are interlocked with the discharge operation switch S4. Only the one who needs it can be cleaned.

Since an air supply nozzle is provided in at least one of the exhaust chamber 12 and the hot air chamber 11 and an exhaust interlocking air control for supplying air by an exhaust switch is provided, this exhaust interlocking air control enables the exhaust chamber during the exhaust operation. Cleaning of the drying portion 3 can be promoted by supplying air to at least one of the 12 and the hot air chamber 11.

A far-infrared radiator 23 is provided on the front wall 31 side of the exhaust chamber 12, and a slit plate 33a and a blind plate 33b capable of opening and closing the slit are provided in the window A opened at a position directly below the far-infrared radiator 23. When cleaning, if the blind plate 33b is opened while the exhaust fan 40a is operating, the outside air directly flows in from the slit plate 33a of the window A of the front wall 31 and passes directly under the far-infrared radiator 23. Therefore, it is possible to prevent the accumulation of dust below the far-infrared radiator 23.

By integrally supporting the slit plate 33a and the blind plate 33b on the front wall 31, the window A can be easily opened and restored when the inside of the ventilation chamber 12 is inspected.

A burner case 6 that projects above the window A of the front wall 31 and is a hot air supply portion, and a rod 34 that extends below the burner case 6 in the front-rear direction and connects to the blind plate 33b are provided, and the front and rear of the rod 34. By axially supporting the blind plate 33b to the slit plate 33a so as to be rotatable back and forth by directional operation, the opening and closing of the window A of the front wall 31 can be easily adjusted by the front and rear operation of the rod 34 extending in the front-rear direction below the burner case 6. Can be operated.

The rod 34 is slidably supported on the bottom of the burner case 6 at its intermediate portion, and is inclined downward to the front to provide a grip 34a at the front end, so that the rod 34 supports the intermediate portion on the bottom of the burner case 6 while supporting the rod. The blind plate 33b can be easily opened and closed by the grip 34a at the tip of the 34.

The grip 34a is configured at a position rearward from the front end of the burner case 6 when the blind plate 33b closes the slit plate 33a, and at a position forward of the front end position of the burner case 6 when the blind plate 33b opens the slit plate 33a. As a result, the position of the grip 34a of the rod 34 corresponds to the opening and closing of the blind plate 33b. In particular, if the blind plate 33b is forgotten to be tightened, the grip 34a pops out from the front end of the burner case 6, so that the blind plate is hard to see. The state of 33b can be easily recognized.

By providing a driving means for opening and closing the blind plate 33b and controlling the opening operation of the blind plate 33b in conjunction with the grain discharging operation after the grain drying operation, the blind plate 33b opens each time the grain discharging operation is performed. The dust accumulated below the far-infrared radiator 23 can be discharged prior to the next drying operation.

1 Grain dryer 2 Storage room 3 Drying part 11 Hot air room 12 Blower room 19 Upper transport spiral gutter 21 Open / close shutter 31 Front wall 33b Open / close lid 36c Open / close operation switch 37 Changeover switch 41 Part of drying net S1 Stretching operation switch S2 Ventilation operation switch S3 Dry operation switch S4 Discharge operation switch A Cleaning window (exhaust room)
B Cleaning window (grain drying passage)
C Cleaning window (hot air chamber)

Claims (2)

A storage section (2) for storing grains and a drying section are vertically configured in the machine wall of the box body, and an operation panel (P) is provided on the front side of the drying section (3).
The drying unit (3) includes a hot air chamber (11) that receives hot air from the hot air supply unit (6), an exhaust chamber (12) that connects to the suction / exhaust unit (40), a hot air chamber (11), and an exhaust air. A grain drying passage (13) for guiding the grain received from the storage section (2) is provided between the chambers (12).
The grain drying passage (13) is formed over the front-rear direction of the drying portion (3) and is also composed of a drying net through which hot air passes, and a part (41) of the drying net can be opened and closed from the left and right outside of the machine wall. configured,
A stopper is provided to stop a part (41) of the drying net that opens and closes so as to give a pressing action to the remaining drying net side, and the stopper is a part (41) side of the drying net or the remaining drying. Attached to the net side,
A grain dryer characterized in that a cleaning window (B) that can be opened and closed is provided on the front wall (31) and the rear wall (32) of the grain drying passage (13), respectively. A hot air supply unit (6), which is a burner case for accommodating a burner (6a), is provided on the front wall (31) side of the airframe, and an exhaust fan (40a) is provided on the rear wall (32) side of the airframe.
A cleaning window (A) that can be opened and closed is provided on the front wall (31) below the hot air supply unit (6) of the exhaust chamber (12) and the rear wall (32) below the exhaust fan (40a).
A cleaning window (C) that can be opened and closed is provided on the front wall (31) below the hot air supply unit (6) of the hot air chamber (11) and the rear wall (32) below the exhaust fan (40a). The grain dryer according to claim 1.

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